Add pipewire and iptables to multilib_whitelist for x86_64

This should fix: https://bugzilla.redhat.com/show_bug.cgi?id=1953178
and pipewire upgrade issues.

Right now the base f34 repo has iptables.i686 and pipewire.i686 in it.

pipewire.i686 would be pulled into updates by mutter.i686, but there's
not yet a mutter update.
iptables.i686 wouldn't be pulled in as nothing depends on it, but it's in the
base repo so thus on users systems.

Signed-off-by: Kevin Fenzi <kevin@scrye.com>

roles/bodhi2/backend/templates/pungi.rpm.conf.j2

@@ -131,7 +131,8 @@ multilib_whitelist = {
         'mariadb-connector-odbc', 'compiler-rt',
         'nvidia-query-resource-opengl-lib',
         'ibus-libs', 'ibus-gtk2', 'ibus-gtk3',
-        'glib-networking', 'dssi-vst-wine', 'mangohud', 'glx-utils'
+        'glib-networking', 'dssi-vst-wine', 'mangohud', 'glx-utils',
+        'pipewire', 'iptables'
     ],
 }
 createiso_skip = [